Instrument-table.



A. W. SCHRAMM.

INSTRUMENT TABLE.

APPLICATION FILED MAR. 30, 1911.

Patented June 15, 1915.

2 SHEETS-SHEET 1.

Q/Z/ZMMM/ A. w. SCHRAMM.

INSTRUMENT TABLE. APPLICATION FILED MAR. 30 1911.

Patented June 15, 1915.

407a $7515 Mags- 2 SHEETS-SHEET 2.

' mas-gas.

AnoLPH w. scimmtim, or PHILADELPHIA, PENNSYLVANIA, ssIe pn. 'ro nnnc'rnoDENTAL MANUFACTURING coMP NY, or PHILADELPHIA, PENNSYLVANIA, A con.-

PORATION OF, PENNSYLVANIA.

INSTRUMENT-TABLE,

To all whom it may concern:

Be it known that I, ,ADOLPH W; SCHRA M, a citizen of the United States,residing in Philadelphia, Pennsylvania, have invented certainImprovements in Instrument-Tables, of which the following is aspecification.

One object of this invention is to provlde a table especially adaptedfor use of dentists and surgeons, Which shall be of such a con structionas will permit of its being'conveniently made and kept aseptlc; its,parts being permit of this operation. p

It is also desired to provide a table of Y the character noted whichshall be convenpositions.

. ends are secured ject of this invention; Fig. '2, is a perspec- Y tiveview of one of the drawers; Figs. 3, and- 4 are fragmentary perspectiveviews of "a, part of the main table frame, and a part of glass retainingframe respec- I and Figs. 5 to 8 inclusive are vertical Anotherobjectof-the invention is to provide an instrument table with novel means forreinforcement of the table structure which means shall also serve as 'arack for holding the instruments in place.

' i These objects and other advantageous as hereinafter set forthreference being had to the -.accompanying drawings, in which g igure 1,is a'p'erspective view. of the improved instrument table forming thesubthe removable tively, sections of the table, illustrating the detailI construction thereof.

In the above drawingsl represents --a, bracket casting particularly fdesigned for attachment to the vertical standard of a dental engine,

may be connected to other supporting structures without in any way,departingfrom the'invention. r

Specification of Letters Patent.

made to be easily separable, few number, and of convenient proportlonsto Y it extends under it from although it isobvious that it PatentedJune 15, 1915.,

r Application filed March 30, 1911. Serial-No. 617,897.

For the to such a structure as that noted, it is provided with a pair ofclamps 3 and 4 of anpurpose of attaching this bracket nular form, eachmade in halves hinged tonarrow elongated plate, and in the presentinstance has rigidly fixed to it a rectangular frame 9; thearrangementbeing such that acrossthe middle of this frame, dividing it into twoelongated rectangular parts. 4

As shown in Figs. 4 and 8,-the long edges of the frame casting 8 and theopposite edges ofv the main frame 9 are channeled or' slotted to receivethe outwardly extending flanges 11 of the drawers 10, hereafterdescribed; these slotted members 9* of the main frame being madesubstantially 'U-.

shaped in section for this purpose, while the endmembers 9 arepreferably solid strips or bars.

Asshown'in Figs. 5 to 7 inclusive, the underside of the frame casting 8is provided with four stops12, two at the opposite ends of each longedge, and these are formed as wedge shaped structures increasing'inthickness inwardly fromthe ends of the said casting, their thickestportions being preferablyundercutat the end. The top of the table isformed by a rectangular. glass plate 13 of substantially the sameshape'as the main frame upon which it rests and of 'a size large enoughto extend at least to the vedges of said frame; there being aremovable-holding frame 14 provided for the purpose of retaining. theglass top in position and forming a ledge around the edge of the tableto prevent articles rolling off the same..- This holding frame isrectangular, in form and is made of heavy sheet metal bent into; asubstantially U'-shaped section, one side of which, however, is ofconsiderably greater 'lengththan the other,

so t at while its short inner side rests u on and projects above thesurface of the grass top, the outer and longer side extends downwardlybeyond the ends and sides of the glass top, fitting closely around themain frame.

It is to be noted that this retaining frame is made of such design thatthe dust falling on the glass, even though it works'under said frame andover the edge of the glass, will fall clear of the drawers. This is amost. important and valuable feature of the invention, as theinstrument's'in the drawers, and more particularly the gold used forfilling teeth, must be kept free'from dust.

As a result'.'with the "construction described, the edges of the glass"are completely covered and the holding frame with this top is firmlyheldto thelmain frame] merely by raising the At the same time, holdingframe 14', the glass top s released and may be removed for cleaning orany other purpose without permitting the dust;

' In order; the holding" frame, its "side; and end members are slottedadj acent' theirupon it to fall into'thedrawers,

to strengthen points of junction and li'ave mounted, in

are made of relatively stifi metal, brazed or These rei forcing anglesare so designed that they project above the top of the holdholders forinstruments whichmight other; wise roll efi the table or be .difiicultto, pick up.

drawers, the present instance, are

The

' of elongated rectangular-form and are made f ablyi sheet metal-havingside flanges 11 whereby they are slidably mounted in the main frame ofthetable. At each end of each, .drawerfis pivotally" mounted a pref- U-shaped ,handle 17 preferably of heavyw re {or light rod material,movablyheld in; place by trunnion screws 18 mounted in openings 1n thesides of the drawer and-rigid1y held in place bynuts 19; the sidearm'sg'lof the handles being, provided with openingsfor the reception ofthe 03 lindrical unthreaded ends of, these screws.

IOn'ejaiiinffof each handle is extended be--- yondh the' s'c'rew pivot,as indicated at 20,

, and carries jajpin21 which-extends into an -open1ng;-22; 1n

' I: .urall y' overbalance the arm the side of the drawer, the sayithreetimes that oi the pi'n. Thej design of the handles is such that theirfront and main -portions'nat- 20 so that this is, ma] tamed} in such aposition that-its" pin-21'-rests upon the highest point of the opening22. The walls of said opening thus 1 form stops for" the handle,keepingitsfront portion ,fr om-v sired position and likewise preventing,said portion from them reinforcing corner? angles '16 which soldered tothe hiettrlofthta holding frame;-

falling 3 below a certain,. de-

being lifted or raised to an:

abnormal extent. .The upper surface 01 each of the extended arms 20 isnotched at 23, usually-adjacent its outer end, and ,the mounting; ofthe'handles is such, that this notch gis cawpable-ofengagement with thewedge shaped undercut end of one of the stops-"12 on the main framecasting. Thus when one of the drawers is pushed inwardly on itssupporting slideways formed by the frame casting8 and the main framestructure '9, the end 24 of one of its arms, engages with the stop 12 atone-side of the frame. structurelso that thejfront or projectingpart ofthe :handle 17 is raised.

the grasping oi either of the handles, ac

companied by, a slightfupward movement thereof, turns it on its.trunnions or pivots and thereby lowers itslnotched arm 20"so that as-thedrawerjis pulled out, said am clears jtheisto'p 12. The outward movementofsaid drawer is limited by the flatend of 'theext'ended' arm 20 of thesecond handle, striking the stop 12 which was first cleared by y theother handle. drawer be pushed inwardly, the notched portion of thissame arm engages the stop 12 to which it is adjacent in theclosedposition and prevents the drawer from, mov--; ing out from underthe opposite side of-the.

If now the table. The grasping of the second handle and the moving to itupwardly, causes this I notched arm to similarly release its stop,

so that' the drawer may be moved outwardly from the opposite side of thetable and is limited as to its movement by the engagement of the end ofits other handlewith one of the stops 12. ;v

From the above it will be seen that both drawers maybe projected fromeither s ide of the table to a predetermined wide open mwardlyffromeither side to a predetermined closed -posi. i0n in which it isautomatically flocked from all. movement in either direction; It isobvious that'either the stop 121;. there. thus being -nothing-to ositionand eitherof them, may be moved? prevent said drawer being completelymoved 1 from the tables 'Byfina, spindle g6;

" conical form, agreater or less retardatie 1s r the tab 'eon'itsbracket'l',-and

provide; against the accide said table'from' said bracket, 1 provide thespmdle 6- with an annular recess 6 and kmgth 11' It in he as. 5 and theprovided tofthe revolution of I order to tal removal of niaaaee mount inthe side of the boss 5 a set screw 5 in such position that its endenters said recess.

With the above described arrangement of parts it will be seen that anydust or foreign material collecting on the glass top is prevented fromentering the drawers, since it extends completely over said drawers tothe edges of the main frame upon which it rests. In order to separatethe instruments in the drawers, I provide in these latter corrugatedholding strips 25 of such length that they tightly fit between the sidemembers of said drawers, serving also to properly support surgical andother instruments above the bottom of the drawer.

I claim 1. The combination of a table with a drawer therefor; supportingmeans for the drawer permitting it to be projected on opposite sides ofthe table; with means for limiting the amount of projection of saiddrawer on either side of the table, said means including a device forautomatically locking the drawer .in its closed position.

2. The combination of a table with a drawer therefor; supporting meansfor the drawer permitting it to be projected on opposite sides of thetable, said supporting means having stops with independent devices forlimiting the amount of projection of said drawer on either side of thetable, each of said devices includingv a member placed to cotiperatewith one of the stops to lock the drawer in its closed position.

' 3. The combination of a table with a drawer therefor; supporting meansfor the drawer permitting it to be projected on opposite sides of thetable; means for locking said drawer under the table includingindependent devices for limiting the amount of projection of said draweron either side of the table.

4:. The combination of a table having 5. The combination of a table; adrawer mounted thereon; andmeans for holding the drawer in its closedposition, the same consisting of fixed stops on the table and pivotallymounted handles on opposite ends of the drawer, each formed and mountedto engage one of said stops to automatically lock to said drawer in itsclosed position and to engage the other stop to limit the outwardmovement of the drawer.

6. The combination. of a table; a drawer therefor; a handle pivoted tothe sides of the drawer and extending across the front thereof, one sideof said handle having a notched portion and being retained in a stopengaging position under the action of gravity; and a stop on the tableplaced to be automatically engaged with the notched portion of said armwhen the drawer is moved to its closed position to lock it therein.

7. The combination of a table; a drawer therefor; two independentlocking devices on the drawer; and two stops on the table both placed tocoiiperate with either locln'ng device to limit movement of said drawerbetween a closed position and two open positions.

8. The combination of a table; a drawer slidably mounted on the table soas to be capable of projection on opposite sides thereof; a handle atone end of said drawer; and two stops on the table; one of said stopsbeing placed adjacent one side of the table in position to engage thehandle to normally prevent projection of the drawer from its closedposition in one direction, and the other stop being placed adjacent theopposite side of the table in position to also engage said handle tolimit the possible projection of the drawer in the opposite direction.

9. The combination of a table; a drawer slidably mounted on the table soas to be capable of projection on opposite sides thereof; two handles atopposite ends of the drawer; and two stops at opposite sides of thetable, respectively placed to he engaged by one handle to preventprojection of the drawer in one direction and also by the other handleto limit the movement of said drawer when moved in the same direction.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

ADOLPH W. SCERAhfl/I.

